// JavaScript Document
if (document.images) {            
img1on = new Image();           
img1on.src = "images/home_button_on.png"; 
img2on = new Image();           
img2on.src = "images/aboutus_button_on.png"; 
img3on = new Image();           
img3on.src = "images/links_button_on.png"; 
img4on = new Image();           
img4on.src = "images/request_callback_button_on.png"; 
img5on = new Image();           
img5on.src = "images/ask_question_button_on.png"; 
img6on = new Image();           
img6on.src = "images/contact_button_on.png"; 


img1off = new Image();           
img1off.src = "images/home_button_off.png"; 
img2off = new Image();           
img2off.src = "images/aboutus_button_off.png"; 
img3off = new Image();           
img3off.src = "images/links_button_off.png"; 
img4off = new Image();           
img4off.src = "images/request_callback_button_off.png"; 
img5off = new Image();           
img5off.src = "images/ask_question_butt_off.png"; 
img6off = new Image();           
img6off.src = "images/contact_button_off.png"; 

function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");        }}
                        
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");        }}
}